Inbound/outbound calls issues on several trunks

Update timeline

1. resolved Dec 24, 2025, 05:00 AM UTC

   Type: Incident Duration: 9 hours and 3 minutes Affected Components: [EMEA] Rainbow Hub Voice Services Dec 24, 16:28:14 GMT+0 - Postmortem - On December 24, 2025, between 05:30 and 14:00 CET, some Rainbow Hub companies experienced inbound and outbound call issues. The incident was caused by a temporary network disruption, which led to an inconsistent NAT port handling on an intermediate component of the Rainbow Hub infrastructure. This affected several trunks, while the majority of services remained operational. Corrective actions were applied, and the issue was fully resolved after a configuration update on the affected intermediate server. All services have since been fully restored, and no other Rainbow services were impacted. Dec 24, 05:00:00 GMT+0 - Investigating - We are currently investigating this incident. Dec 24, 07:46:11 GMT+0 - Resolved - This incident has been resolved. Dec 24, 08:18:12 GMT+0 - Investigating - We are currently investigating this incident. Dec 24, 08:44:23 GMT+0 - Investigating - We are continuing to work on a fix for this incident Dec 24, 09:28:26 GMT+0 - Identified - Several fixes have been applied, we monitor the system Dec 24, 09:47:51 GMT+0 - Monitoring - We are currently monitoring the result Dec 24, 10:50:32 GMT+0 - Monitoring - Remaining cases are identified, we work on fixes Dec 24, 14:02:35 GMT+0 - Resolved - This incident has been resolved. We'll provide RCA soon